Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb12e7d835697b3…

MALICIOUS

PDF

46.5 KB Created: 2020-07-23 23:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 83d26d8d1cc3ca1bf8ec351b9a074a70 SHA-1: 5faa7e84cbaed5accbc48a28f9cce0195b096cb1 SHA-256: cdb12e7d835697b3cd387361c328a5c9711c4449a58e50a7ca2ddc29a7890571
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as a search result for 'open pdf online android'. It also includes a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The embedded URLs are the primary indicators of malicious intent, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=open%20pdf%20online%20android In PDF document text
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdfIn PDF document text
    • http://files.crystalwrightdesign.com/uploads/1/3/1/4/131438330/d769f58389.pdfIn PDF document text
    • http://files.sophia-speaks.com/uploads/1/3/1/4/131455832/sigafowusuke.pdfIn PDF document text
    • http://files.grichardpotts.com/uploads/1/3/1/3/131384656/f8e9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/fonanebedirubonuxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/zerapekiduzex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/16916263478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/23176498981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/28821992689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/vitegekunew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/89236355333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/ribofoxezavudutafelud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/nibuvapufapifefezitixexuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/70162083926.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7574 4592 bytes
SHA-256: 2bf3efc0e3b2daabd2a6951121a939823af2b508a262e0b073296ce9444c2273
font_01_sfnt_off00008512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8512 12316 bytes
SHA-256: 62bba2044695ff6c6858b7d5519d0aa0d2b70647b1be55d524fb1173341847b4

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